_______________ is an open source video format developed by Google and used for HTML5 video.
Fill in the blank(s) with the appropriate word(s).
.WebM
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In the accompanying figure, the cell with the "COMP 101" contents is an example of the use of a ____ attribute.
A. rowspan B. colspan C. merge D. spancol
(Simple Encryption) Some information on the Internet may be encrypted with a simple al- gorithm known as “rot13,” which rotates each character by 13 positions in the alphabet. Thus, 'a' corresponds to 'n', and 'x' corresponds to 'k'. rot13 is an example of symmetric key encryption. With symmetric key encryption, both the encrypter and decrypter use the same key.
a) Write a program that encrypts a message using rot13. b) Write a program that decrypts the scrambled message using 13 as the key. c) After writing the programs of part (a) and part (b), briefly answer the following question: If you did not know the key for part (b), how difficult do you think it would be to break the code? What if you had access to substantial computing power (e.g., supercomputers)? In Exercise 18.25 we ask you to write a program to accomplish this.
When connecting to the Internet via a cable connection, how are the data speeds typically organized between the cable provider and the customer?
A) Data is spread equally in both directions. B) Data from the provider to the customer is slower than data from the customer to the provider. C) Data from the provider to the customer is faster than data from the customer to the provider. D) The data rate depends on the time of day, sometimes faster in one direction, sometimes faster in the other direction.
A(n) ____ variable is used to control the lifetime of each entry in the routing table.
A. invalid timer B. update timer C. hold-time timer D. flush timer